Physics of the Solid State
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Magnetic phase transformations and hyperfine interactions in a multicomponent system alloys (Ho1-xY_x)0.8Sm0.2Fe2 (0≤ x≤ 1)
Umkhaeva Z.S.
1, Rusakov V. S.
2, Gubaydulina T. V.
2, Karpenkov A.Yu.
3, Tereshina I. S.
2, Pankratov N. Yu.
2, Aliev I. M.
1
1Kh. Ibragimov Complex Institute of the Russian Academy of Sciences, Groznyi, Russia
2Lomonosov Moscow State University, Moscow, Russia
3Tver State University, Tver, Russia
2Lomonosov Moscow State University, Moscow, Russia
3Tver State University, Tver, Russia
Email: zargan.umhaeva@yandex.ru, rusakov@phys.msu.ru, tgubaidulina@yandex.ru, karpenkov_alex@mail.ru, irina_tereshina@mail.ru, pankratov@phys.msu.ru, ialiew@mail.ru
This paper presents the results of the study of structural and magnetic properties, as well as hyperfine interactions in a multicomponent system alloys (Ho1-xY_x)0.8Sm0.2Fe2, where x=0, 0.2, 0.4, 0.6, 0.8, 1.0. It is established that all the obtained alloys are single-phase and possess atomic-crystalline structure of cubic symmetry of the type of Laves C15 phase. For alloys of the system (Ho1-xY_x)0.8Sm0.2Fe2 the values of Curie temperatures, saturation magnetisation σs have been determined, the values of magnetic moment coming to the iron atom μFe have been calculated. The studies of the Mossbauer effect on 57Fe nuclei at room temperature have been carried out. The values of hyperfine parameters of Mossbauer spectra for all alloys of the system (Ho1-xY_x)0.8Sm0.2Fe2 have been determined. The dependences of structural and magnetic parameters on the concentration of yttrium (a non-magnetic analogue of rare-earth elements) have been analysed and the features related to magnetic phase transformations in the studied system have been revealed. Keywords: Laves phases, magnetization, Curie temperature, magnetic moment, Mossbauer effect, hyperfine fields, isomeric shift, quadrupole coupling constants, easy magnetisation axis.
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